Improvement in combined hot-air and hot-water furnaces



I c. coMsTocK. Combined Hot-Air and Hot-Water Furnaces. No.\50,750, IPatntedMay12,1874.

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UNITED STATES PATENT OFFICE.

cEEsTEE ooMsrocK, on NEW OANAAN, CONNECTICUT.

IMPROVEMENT IN COMBINED HOT-AIR AND HOT-WATER FURNACES.

Specification forming part of LettersPatent No. 150,750, dated May 12,1874; application filed November 1, 1873.

To all whom itmag concern.-

Be it known that I, CHESTER CoMsrooK, of New Canaan, in the county ofFairfield and State of Connecticut, have invented a Oombined Hot Air andHot -Water Furnace, of which the following is a specification Thedrawing represents a vertical central section of my combined hotair andhot-water furnace.

The heating of improperly ventilated buildings is always imperfect,inasmuch as heated impure air tends more to generate disease and tooffend the senses than cold air, and as also by the absence ofventilation the upper stratums only of the air contained in a room willbe warmed, while the lower stratums will not be properly reached by theheating apparatus, except at a great outlay of fuel My invention has forits object to produce in one furnace means for heating and also forventilating buildings-in fact, to combine in one apparatus a hot-air anda'hot-water furnace, so that the hot air may be used for ventilating thebuilding and displacing the cold impure air, while the hot water orsteam will be used to warm the air in the room, the admission of thewarm air into the rooms being only for the purpose of taking off thechill of the replacing air, and preventing it from entering the rooms intoo cool a state, there to be heated.

' My object is attained by combining in one furnace a water-heater orsteamgenerator and a hot-air chamber, and by combining, therefore, inone furnace, the three pipes for taking away the products of itsoperationto wit, the smoke-pipe, the hot-air pipe, and the hot-water orsteam pipe.

In the accompanying drawing, the letter A represents the outer shell ofmy improved furnace. B is an inner shell, placed within A, and havingwithin it a smoke chamber, 0, while between A and Ban air=chamber, D, is

produced. This air-chamber is supplied with fresh air at the lower endthrough openings at in the bottom of the furnace, and discharges the airin' a heated condition through a pipe, L b, at the top, in which pipethe air is taken to lower end of a pipe, d, or by other means, and

discharges its hot water or steam from the top through a pipe, 0. f f Xextend through the length of the hot-water chamber F into the uppersmoke-department G.

The smoke from the fire passes up through the inner pipes f, and escapesthrough the upper branch 9 of the smoke-flue If the damper h in suchbranch is closed, the smoke passes up in the center pipes f, then downagain through the outer series f X of pipes in the chamber F, and downalso in the smoke-space G, that surrounds the chamber F, and out throughthe lower branch g of the smoke-pipe 9 thus entirely surrounding the'chamber F and economizing heat. Fuel is fed to the grate through anopening, j, that extends through the shells A B, and through the frontpart of the water-chamber F, as indicated.

As to the construction of the water-chamber or steam-generator F, I donot confine myself to its precise arrangement or shape, although Iprefer to arrange it in an annular form around and in a cylindrical formabove the fire-place E. Neither do I confine myself to any 'particularshape or size of the shells A B.

I claim as my invention The hot-water chamber F, provided with the pipesf f and combined with the fire-place E, shells B A, and smoke-pipes g g9 substantially as described.

Witnesses: CHESTER OOMSTOOK.

H. B. ROGERS, STEPHEN A. DODGE, Jr.

